linux-kernel - Re: [PATCH 11/14] KVM: selftests: Disable "gnu-variable-sized-type-not-at-end" warning

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Date:   Wed, 11 Jan 2023 17:23:00 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Nathan Chancellor <nathan@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Tom Rix <trix@...hat.com>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        kvmarm@...ts.cs.columbia.edu, linux-riscv@...ts.infradead.org,
        llvm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Ricardo Koller <ricarkol@...gle.com>,
        Aaron Lewis <aaronlewis@...gle.com>,
        Raghavendra Rao Ananta <rananta@...gle.com>
Subject: Re: [PATCH 11/14] KVM: selftests: Disable
 "gnu-variable-sized-type-not-at-end" warning

On 12/13/22 03:13, Sean Christopherson wrote:
> AFAICT, gcc stopped treating unknown "-Wno" flags as unconditional errors starting
> with gcc-4.4, and the kernel's min supported version is 5.1.  gcc-4.4 through
> gcc-9.5 all print a mild warning if there's a different error, but otherwise
> silently ignore the uknown "-Wno".
> 
>    cc1: warning: unrecognized command line option '-Wno-gnu-variable-sized-type-not-at-end'

scripts/Makefile.compiler has cc-disable-warning for this, we can copy 
it to tools/.

Paolo